Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution

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	Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution
	Long, Jinxing; Xu, Ying; Wang, Tiejun; Shu, Riyang; Zhang, Qi; Zhang, Xiaohong; Fu, Juan; Ma, Longlong
	2014-11-01
发表期刊	BIORESOURCES
卷号	9 期号:4 页码:7162-7175
摘要	The structural evolution of Panicum virgatum lignin during hydrothermal depolymerization was investigated. Product distribution from various temperatures was studied using gas chromatography-mass spectrometry (GC-MS) and gel permeation chromatography (GPC) analysis. The physical-chemical properties of initial lignin, tetrahydrofuran soluble fraction, and char were also comparatively characterized by elemental analysis, scanning electron microscopy (SEM), thermogravimetry (TG), and Fourier transform infrared (FT-IR) spectroscopy. Results showed that both the depolymerization and repolymerization were significantly temperature-dependent. The undesired char formation becomes obvious when the temperature is greater than 180 degrees C. Further investigation demonstrated that H lignin is the most accessible for hydrothermal depolymerization, whereas S lignin is the most recalcitrant. Moreover, under the thermal effect and the dissolution of the subcritical water, the basic structure of lignin was first collapsed and then further decomposed into low-molecular weight products by the fracture of ether bonds, accompanied by char formation after repolymerization and dehydration.
文章类型	Article
关键词	Lignin Depolymerization Repolymerization Structural Evolution
WOS标题词	Science & Technology ; Technology
研究领域[WOS]	Materials Science
关键词[WOS]	IONIC LIQUID PAIRS ; CATALYTIC DEPOLYMERIZATION ; SUGARCANE BAGASSE ; KRAFT LIGNIN ; HOT-WATER ; CONVERSION ; CHEMICALS ; CELLULOSE ; BIOMASS ; DELIGNIFICATION
收录类别	SCI
语种	英语
WOS类目	Materials Science, Paper & Wood
WOS记录号	WOS:000345396900110
引用统计	被引频次：32[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/10656
专题	中国科学院广州能源研究所
作者单位	Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Long, Jinxing,Xu, Ying,Wang, Tiejun,et al. Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution[J]. BIORESOURCES,2014,9(4):7162-7175.
APA	Long, Jinxing.,Xu, Ying.,Wang, Tiejun.,Shu, Riyang.,Zhang, Qi.,...&Ma, Longlong.(2014).Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution.BIORESOURCES,9(4),7162-7175.
MLA	Long, Jinxing,et al."Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution".BIORESOURCES 9.4(2014):7162-7175.